"We'll have to work on the crowd noise," Harbaugh said, according to The Baltimore Sun. "We had a loud stadium in Cleveland, and it's only going to be louder in Indianapolis because it's indoors. And rumor has it they pipe crowd noise in there, so we'll see if that's the case or not going back there again. But we'll be looking forward to it."

On Wednesday, Colts coach Chuck Pagano -- who was once Harbaugh's defensive coordinator in Baltimore -- didn't seem amused when asked about the pipe crowd noise "rumor" perpetuated by his former boss.

"I think that's more of an insult to our 12th man, if you will," Pagano said. "I think he's calling out our fans, which I think are the best fans in the National Football League. So we'll see how our 12th man reacts to that insult."

Two thoughts: 1) Every coach and player seems certain their fan base is the best fan base in the NFL. And 2) Pagano knows what he's doing. Expect the Colts' home crowd to be especially fired up by insinuation they are on PES (performance-enhancing speakers).